/* Define color variables for easier management */
:root {
  --background-color: #f1f3f8;
  --sidebar-bg: #1e1e2d;
  --sidebar-text: white;
  --sidebar-link-hover: #4a6581ff;
  --sidebar-link-active: #495057;
  --badge-bg: #17a2b8;
  --top-navbar-bg: white;
  --top-navbar-shadow: rgba(0, 0, 0, 0.05);
  --card-shadow: rgba(0, 0, 0, 0.05);
  --card-bg-primary-start: #007bff;
  --card-bg-primary-end: #0056b3;
  --card-bg-success-start: #28a745;
  --card-bg-success-end: #1e7e34;
  --card-bg-warning-start: #ffc107;
  --card-bg-warning-end: #e0a800;
  --card-bg-info-start: #17a2b8;
  --card-bg-info-end: #117a8b;
}

/* Body Styling */
body {
  background-color: var(--background-color);
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
}

/* Sidebar */
.sidebar {
  width: 250px;
  height: 100vh;
  position: fixed;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  transition: all 0.3s;
  z-index: 1040;
  top: 0;
  left: 0;
  overflow-y: auto;
}

.sidebar.collapsed {
  width: 70px;
  overflow-x: hidden;
}

.sidebar .nav-link {
  color: var(--sidebar-text);
  font-size: 17px;
  padding: 6px 8px;
  border-radius: 7px;
  font-weight: bold;
  white-space: nowrap;
}

.sidebar .nav-link i {
  min-width: 30px;
  text-align: center;
}

.sidebar.collapsed .nav-link span,
.sidebar.collapsed .sidebar-logo,
.sidebar.collapsed form,
.sidebar.collapsed p {
  display: none !important;
}

.sidebar .nav-link:hover {
  background-color: var(--sidebar-link-hover);
}

.sidebar .nav-link.active {
  background-color: var(--sidebar-link-active);
}

.sidebar .badge {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 50px;
  background-color: var(--badge-bg);
}

/* Main Content */
.main-content {
  margin-left: 250px;
  transition: margin-left 0.3s;
}

.main-content.collapsed {
  margin-left: 70px;
}

/* Top Navbar */
.top-navbar {
  background: var(--top-navbar-bg);
  box-shadow: 0 2px 10px var(--top-navbar-shadow);
  height: 80px;
  position: fixed;
  width: 100%;
  z-index: 1030;
  padding-left: 250px;
  transition: padding-left 0.3s;
}

.top-navbar.collapsed {
  padding-left: 70px;
}

.top-navbar form {
  width: 280px;
  margin-left: auto;
}

.top-navbar form .form-control {
  height: 32px;
  font-size: 14px;
}

.sidebar img {
  max-height: 30px;
  max-width: 100%;
}

/* Responsive Sidebar */
@media (max-width: 768px) {
  .sidebar {
    left: -250px;
  }
  .sidebar.show {
    left: 0;
  }
  .main-content, .top-navbar {
    margin-left: 0 !important;
    padding-left: 0 !important;
  }
}

/* Unique Card Design */
.card-custom {
  border: none;
  border-radius: 1rem;
  box-shadow: 0 10px 25px var(--card-shadow);
  color: white;
  padding: 20px;
}

.card-custom .icon {
  font-size: 2.5rem;
  opacity: 0.8;
}

/* Gradient Backgrounds for Cards */
.bg-gradient-primary {
  background: linear-gradient(135deg, var(--card-bg-primary-start), var(--card-bg-primary-end));
}

.bg-gradient-success {
  background: linear-gradient(135deg, var(--card-bg-success-start), var(--card-bg-success-end));
}

.bg-gradient-warning {
  background: linear-gradient(135deg, var(--card-bg-warning-start), var(--card-bg-warning-end));
  color: #212529;
}

.bg-gradient-info {
  background: linear-gradient(135deg, var(--card-bg-info-start), var(--card-bg-info-end));
}